Variable-speed gearing.



No. 787,080. PATENTBD APR. 11, 1905. W. G. CONANT.

VARIABLE SPEED GEARING.

APPLIUATION FILED MAY 9. 1904.

8 SHEETS-SHEET l,

No. 787,080. PATENTED APR. 11, 1905. W. O. GONANT. VARIABLE SPEEDGEARING.

APPLIUATION FILED MAY 9. 1904.

8 SHEETB-SHEET 2.

Z f afiycis five 2%71 mam aezmnz. dz 262 M PATENTED APR. 11, 1905. W. G.GONANT.

VARIABLE SPEED GEARING.

APPLIOATION FILED MAY 9. 1904.

8 SHEETS-SHEET 3.

PATENTED APR. 11, 1905. W. G. OONANT. VARIABLE SPEED GEARING.

APPLIUATION FILED MAY 9. 1904.

8 SHEETS-SHEET No. 787,080. PATENTED APR. 11, 1905. W. G. GONANT.

VARIABLE SPEED GEARING.

APPLICATION FILED MAY 9. 1904.

8 SHEETSSHEET 5.

No. 787,080. PATENTED APR. 11, 1905. W. G. GONANT.

VARIABLE SPEED GEARING.

APPLIUATION FILED MAY 9. 1904.

8 SHEETSSHEET 6.

fivrza of PATENTED APR. 11, 1905.

W. C. CONANT. VARIABLE SPEED GEAEING.

APPLICATION FILED MAY 9. 1904.

8 SHEETS-SHEET 8.

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UNTTan STATES PATENT @rrrca.

WILLIAM G. CONANT, OF ATLANTA, GEORGIA.

VARlABLE-GSPEFED GEARIING.

SPECIFICATION forming part of Letters Patent No 787,080, dated April 11,1905. Application flied May 9, 1904. Serial No. 207,083.

To all whont it may (20.000771..-

Be it known that 1, WILLIAM (J. CoNANT, a citizen of the United States,residing at Atlanta, in the county of Fulton and State of Georgia, haveinvented a new and useful Improvement in Variable Speed Gearing, ofwhich the following is a specification.

This invention relates to improvement in the construction oftransmission-gear mech- IO anism adapted to be interposed between moreespecially driving and driven shafts and adjustable to vary the powerand speed tansmitted through it to the driven shaft.

y object is to provide such a transmissiongear mechanism of generallyimproved construction, capable of ready adjustment to change the speedof the driven shaft throughout a comparatively wide range with relaticinto the driving-shaft and of effecting such changes in a smooth andgradual manner without jar.

it is further my object to embody my improvement in a compact, strong,and durable device or construction.

My invention is particularly well adapted for use upon automobiles, aswell as in other connections, where the prime mover, such as agas-engine or electric motor, runs at a constant high speed of greatestefliciency and 3 drives the running-gear or the like at a reduced speed.in carrying out my invention I prefer to providea drive-shaft or itsequivalent having a radially-adjustable crank or eccentric camsurrounded by and forming a driving-bearing for anindependently-revoluble power transmitting or driving wheel. Surroundingthe said driving-wheel is a ring or shell having an inner conoidaldrivingwheel-engaging surface concentric with the 4 said drive-shaft.Theshell and driving-wheel form engaging members which are maintained inconstant surface-gripping contact and so mounted with relation to eachother that one may be moved independently of the other along the planeof the center of rotation of the said drive-shaft without relaxing thesurface engagement between them, whereby in the rotation of thedrive-shaft and its crank the said driving-wheel is rotated in the 5direction contrary to that of the shaft. The

driven shaft is in alinement with the driveshaft and is rotated by andin the same direction as the said driving-wheel.

The variations in speed are produced at will by adjusting the shell anddriving-wheel with relation to each other along the line of the centerof rotation of the shafts, the grippin-g engagen'lent between the wheeland shell being always maintained to prevent slip between them. Improvedmeans are provided for maintaining the desired gripping contact betweenthe said engaging members, comprising in the present embodiment of myinvention an annular series of longitudinallyextending relativelyflaring teeth on the inner frusto-conic surface of the shell and anannular series of radially-yielding teeth upon thedriving-wheel. Animproved driving connection is provided betweenthe said drivingwheel andthe driven shaft, and means also of improved construction are providedfor automatically balancing the adjustable crank and driving-wheel inany adjusted position along the drive-shaft.

In the construction shown in the accomanying drawings the drive-shaftand shell are moved longitudinally with relation to the saiddriving-wheel and driven shaft to prod uce the the changes of adjustmentforspeed variations.

Referring to the drawings, Figure l is a broken vertical longitudinalsection through the variable-speed gearing; Fig. 2, a section on line 2in Fig. l with parts broken away; Fig. 3, a section taken on line 3 inFig. 1 with the cap or casing at that part removed; Fig. 4, a brokensectional view, the section being taken on an irregular line I 4 in Fig.'1 and viewed in the direction of the arrows; Fig. 5, a plan sectiontaken on line 5 in Fig. 1; Fig. 6, an enlarged broken plan view of theperiphery of the driving-wheel; Fig. 7, a still further enlarged brokensection taken on line 7 in Fig. 6; Fig. 8, an enlarged broke perspectivesectional view of the drive'shaft, the section being taken at line inFig. 1; Fig. i), a face view of a disk secured to a head forming theinner end of the driven shaft; Fig. 10, a face View of the head or innerend of the driven shaft; Fig. ll, a diagrammatic view illustrat-'conoidal surface.

ing the operation of the driving-ring in driving the disk shown in Fig.9 with the head shown in Fig. 10 and the driven shaft; and Fig. 12, aview in elevation, on a reduced scale, of the variable-speed gearingdevice.

A means of supporting and adjusting the variable-speed device isindicated for purposes of illustration by dotted lines in Fig. 12.

A is abase carryinga pillow-block a and having guide-flanges Z), onwhich a block B slides longitudinally, being moved by a screw 0.

- C is a shell or casingwhich is shown in Fig.

12 to be integral with the block B. The said shell has a frusto-conicinner surface formed with teeth (1. On the end of the shell is ajournal-bearing e, through which extends the drive-shaft l), and theteeth (Z extend longitudinally of the shell. Thus the apexes of theteeth (i' are not parallel with each other, but converge toward the apexof the cone of the The connection at f between the drive-shaft and shellis such that the shaft rotates freely in the bearing, but moveslongitudinally with the shell. Fastened to the large end of the shellCisacap or shell member 0', forming a bearing at g for a driven shaft E.As shown in Fig. 12, the driven shaft E rotates in the pillow-block a,but is held therein against longitudinal movement. \Vithin the bodyportion 0 of the shell the shaft 1) is squared. This squared portion itis provided on opposite sides with feathers zTg/T, extending in aninclined direction, as shown in Figs. 1 and 8. The angle of the feathers2' with reference to the center of rotation of the drive-shaft is thesame as that of the toothed conoidal surface of the shell. ()n the otherfaces of the squared portions it of the shaft are guide-surfaces 7c,parallel with each other and of the same pitch with reference to therenter of rotation as the feathers 1', but in a plane at right anglesthereto. Surrounding the shaft 1) is a radially-adjustable block F,which when not concentric with the shaft operates as a crank oreccentric cam. It is provided with an opening I through it. formed Williguide-grooves fitting the feathers 2' of the drive-shaft. The connectionbetween the shaft and crank F is such that the shaft turns the crank,but may be'moved longitudinally through it, and in such movement guidesthe crank at its most eccentric side parallel with the adjacent surfaceof the conoidal shell. The crank F is formed in its periphery withrecesses 11/, in which are journaled rollers 72 on bearing-pins p.

(i is a driving-wheel provided in its inner circuu'iferential face withan annular recess g, into which the rollers 11 extend to form anantifriction-bearing around which the wheel rotates. The wheel (f isformed in its peripheral bell-shaped or conical face with an annularseries of sockets w, containing radiallymovable plunger-teeth .w, heldnormally in extended position by springs t and having outer edgesparallel with said face. The wheel G rotates freely upon the rollers'21, ecceutrically with relation to the drive-shaft, and thus gyrateswith its most eccentric point or part at all times close to the toothedsurface of the shell, whereby one or more of its teeth will extend inengaging contact with one or more of the teeth of the shell. When theshell and drive-shaft are shifted longitudinally bymeans of the screwy,the shaft in sliding through the crank F moves the latter by means ofthe feathers I radially toward or away from the center of rotation ofthe shaft in a manner to maintain the most eccentric point of thedriving-Wheel Gr at the same distance at all times from the conoidalsurface of the shell.

H isa radially-adjustable counterweight for the crank F and eccentricwheel G. It comprises a block having a rectangular opening w through it.At opposite sides of the opening *1 are inward-projecting splines m,which engage grooves y in two projecting flanges 2 on the adjacent faceof the crank F. Passing through opposite ends of the counterweight H areadjusting-screws 13, which at their inner ends engage the parallelsurfaces Z on the shaft 1). The ends of the screws are in slidingcontact with the surfaces A, and in the movement of the shaft and shellin the longitudinal direction the counterweight is slid radially inwardor outward in the direction contrary to the radial movement of the crankand eccentric wheel. Thus as the said crank and wheel are shifted towardthe center of rotation of the shaft the counterweight is also shiftedtoward the center of rotation, and vice versa. It will be seen,therefore, that whatever the adjustment of the eccentric with referenceto the drive-shaft it will be counterbalanced at all times by thecounterweight H.

15 is a disk-shaped head integral with the driven shaft E. It isprovided in its inner face with four shallow circular recesses orclearance-spaces 16, surrounded by annular ribs or tongues 17, as shownin Figs. land 10. Fitting against the head 15 is a disk 18, providedwith four circular openings 19 through it registering with the recesses16 in the lead 15. The disk 18 fits flat against the face of the disk orhead 15, and around the openings 19 are central narrow ribs 20, flankedby annular recesses around the openings 19. The circumferential walls ofthe recesses nearest the head 17 form annular bearingsurfaces 21, andthe circumferential walls of the other recesses form annularbearing-surfaces 22. ()n the wheel G are four bearing-sockets 23, inwhich are fastened four short shafts 24, extending through the openings19 in the disk 18. Journaled on the shafts 24 are rollers 25, in contactwith the annular surfaces 22, and rollers 26, in contact with theannular surfaces 21. Each pair of rollers 25 26 loosely embraces therespective rib 20, and the disk 18 is held tightly by the head 15. Thusthere is no material relative longitudinal play between the head 15,wheel G, and intermediate parts.

In the turning of the drive-shaft D the crank F turning upon the centerof rotation of the drive-shaft swings the driving wheel or member Graround the same center, while the wheel is maintained in engagement withthe conoidal surface of the other member or shell 0. The wheel is thusgiven angular movement around the crank F at a compare tively slow speedin the direction opposite the direction of rotation of the drive-shaft.The rollers 25 26- engaging the surfaces 22 21 turn the disk'l8, andconsequently the head 15 and shaft E, in the same direction as thedriving-wheel G, the curve or path of movement of the rollers 25 26 inthe openings 19 while driving the said disk and head being ahypocycloid, as indicated for purposes of illustration in the diagramFig. 11. The driving engagement between the drivingwheel anddriven-shaft is such that in the revolutions of the said wheel at leastone pair of rollers 25 26 will at all times be in driving contact withsurfaces 22 21, and the driving is performed smoothly and with a minimumamount of friction.

According to the construction of my invention, as illustrated in Fig. 1,the drive-shaft and shell may be shifted to the left from the positionshown until the drive-wheel G is adjusted to a position concentric withthe driveshaft, the figures showing the wheel in the position ofgreatest eccentricity. The teeth 8 may be sufficiently numerous to causeat least one thereof to be engaged by a tooth d in driving relationwithout slip or with but a very slight slip while in any position ofadjustment. Those teeth 8, which'cannot enter to the full extent theserrations d are more or less retracted against their springs by thepressure in the radial direction of the serrated surface of the shell.

In the movement of the shell 0 and cap C the latter slides readily alongthe driven shaft, and the said shaft has a bore 27, in which thecylindrical part of the shaft D beyond the squared portion It may slideand rotate. In the end portion of the driven shaft the bore is enlarged,as indicated at 28, to surround the path of rotation of the splines orfeathers 21 on the squared portion of the shaft, which in adjustmentsfor speed variations may slide into said enlargement.

The drawings show the member or wheel G in the position of greatesteccentricity with relation to the drive-shaft and member or shell (1, inwhich position the diameter of the wheel G is approximately four-fifthsthat of the surface of the shell which it engages. Movement of the blockor crank counter clockwise capses the wheel G to be moved bodily counterclockwise at the speed of the crank and owing to its engagement with theshell to be given angular movement clockwise at a speed, in this adustment, approximating onefourth that of the crank and drive-shaft. Thusin the construction shown the members when adjusted as illustrated willcause the driven shaft to rotate once clockwise with approximately everyfour rotations counter clockwise of the drive-shaft. As the drive-shaftand shell are shifted toward the left in Fig. l the eccentricity of thewheel G and diameter of the shell-surface engaged thereby diminishproportionately, with proportionate decrease in relative angularmovement and consequent increase of torque of the wheel Ur and drivenshaft. This shifting movement may progress until the wheel Gisconcentric with the driveshaft and shell, at which time turning of thedrive-shaft will turn the block F in the wheel G without imparting anymotion to the latter or consequently to the shaft E. By shifting thedrive-shaft and shell from the lastnamed position and in the directioncontrary to that stated the shaft E may be started at very slow speedand the speed then increased as desired.

The gist of my invention lies in providing a variable-speed gearingformed with a pair of engaging members, one or both of which rotates,one said member of relatively small diameter engaging the other saidmember of relatively larger diameter, and means for changing therelative engaging diameters of the members while maintaining positive driving engagement between them. Mere frictional engagement between themembers would not elfect the positive driving engagement desired. Thedrawings show but one embodiment of my improvements where a comparatively short range of power and speed variation is provided for. Ofcourse the shell or its equivalent may be of any desired length and itsconoidal surface of any desired pitch with reference to the drive-shaftscenter of rotation, other parts of the mechanism being constructed tocorrespond. Thus the range of adjustment for speed variations may begreatly increased.

While I have alluded to the shaft D as the drive-shaft, the power may beapplied to the shaft E to drive the shaft D through the variable-speedgearing.

It will be obvious that a change in construction employingadriving wheelor drum with an elongated conoidal engaging face and a surroundingstationary short-faced toothed ring in lieu of the shell would togetherconstitute a mere reversal and'equivalent of the construction shown.This would also be the case if the surrounding ring or shell wereprovided with yielding teeth instead of or as well as the drive-wheel.If desired, the shell and shaft D may be held against longitudinalmovement, and adjustments for speed variations brought about by shiftingthe driven wheel and attendant parts, and various other changes may bemade in details' of construction without departing from the spirit of myinvention'as defined by the claims.

WhatI claim as new, and desire to secure by Letters Patent, is

1. The combination with driving and driven bodies, of variable-speedgearing interposed between them, having toothed engaging members one ofwhich meshes with and rolls upon the other and is operatively connectedwith both of said bodies. the members being adjustable one with relationto the other to gradually change the relative diameters of their meshingsurfaces.

2. The combination with driving and driven bodies, of variable-speedgearing interposed between them having toothed engaging members one ofwhich moves as a planet-wheel meshing with and rolling against theother, the members being adjustable one with relation to the other togradually change the relative diameters of their toothed engagingsurfaces.

3. In a variable-speed gearing, the combination of an internally-toothedring forming one of a pair of engaging members, a rotary toothed wheelhaving an eccentrically-moving axis within the said ring and forming theother engaging member, the toothed engaging face of one member beingconoidal and longer than the toothed engaging part of the other mem her,and means for moving one of said members longitudinally with relation tothe other while maintaining them in mesh.

4. In a variable-speed gearing, the combination of a ring forming one ofa pair of engaging members and having an internal toothed frusto-conicalengaging face,a toothed rotary wheel having an eccentrically-moving axiswithin said ring and forming the other engaging member, and means formoving one of said members longitudinally with relation to the otherwhile maintaining them in mesh.

5 In a variable-speed gearing, the combination of an internally-toothedring forming one of a pair of engaging membei's, a peripherally-toothedrotary Wheel eccentrically mounted within said ring and forming theother engaging member, the engaging face of one of said members beingconoidal and longer than the engaging part of the other member, andmeans for moving one of said members longitudinally with relation to theother,while maintaining them in driving engagement.

6. In a variable-speed gearing, the combination of an internally-toothedring forming one of a pair of engaging members, a pcripherally-toothedrotary Wheel eccentrically mounted within said ring and forming theother engaging member the teeth of one mem-. her being radially yieldingand the engaging face of one member being conoidal and longer than theengaging part of the other member, and means for moving one of saidmembers longitudinally with relation to the other while 6 maintainingthem in driving engagement.

7. In a variable-speed gearing, the combination of a ring having aninternal conoidal surface provided with longitudinally-extending teethand forming one of a pair of engaging members, a rotary wheel havingperipheral radially-yielding teeth and eccentrically mounted within saidring and forming the other engaging member, and means for moving one ofsaid members longitudinally with relation to the other while maintainingthem in driving engagement.

8. In a variable-speed gearing, the combination of an internally-toothedring forming one of a pair of engaging members, a peripherally -toothedrotary wheel eccentrically mounted within said ring and forming theother engaging member, the teeth of one member being radially yielding,the teeth of the other member being of ratchet form and the engagingface of one member being conoidal, and means for moving one of saidmembers longitudinally with relation to the other while maintaining themin driving engagement.

9. In a variable-speed gearing, the combination of a rotary shaft,engaging members comprising an internally-toothed ring and a toothedwheel eccentrically and rotatably mounted on said shaft within andmeshing with the ring,'one of said members having a 95 conoidal engagingsurface longer than the engaging part of the other member, means formoving one of said members longitudinally with relation to the otherwhile maintaining their engagement, and a second shaft operativelyconnected with said wheel.

10. In a variable-speed gearing, the combination of a rotary shaft,engaging members comprising a ring and an independently-rotating wheeleccentrically mounted on said shaft within the ring, one of said membershaving a conoidal engaging surface longer than the engaging part of theother member, means for moving one of said engaging memberslongitudinally with relation to the other While maintaining theirengagenient, means for preventing angular slip of the driving- Wheelagainst the ring, and a second shaft operatively connected with saidwheel.

11. In a variable-speed gearing, the combination of a rotary shaft, aradially-adjustable peripherally-toothed eccentric wheel looselyjournaled about said shaft, a non-rotatable internally-toothed ringabout said wheel, said wheel and ring forming engaging membersrelatively adjustable longitudinally, one member being longer than theother and having a conoidal engaging surface and the teeth of one memberbeing radially yielding, a second rotary shaft and a connection betweensaid eccentric Wheel and said second shaft.

12. In combination with d riringaud driven shafts, a variable-speedgearing havirigan eecentric toothed wheel operatively connected with oneof said shafts and mounted on the other of said shafts to rotateindependently thereon and forming one of a pair of mesh- I ing members,an internally-toothed ring about I said wheel forming the other member,the toothed engaging face of one member being I conoidal and longer thanthe engaging part of the other member, and means for-shifting one ofsaid members longitudinally of the other while maintaining them in mesh.

13. In combination with driving and driven shafts, a variable-speedgearing having a radially-adjustable eccentric wheel opcrativelyconnected with one of said shafts and mount ed on the other said shaftto rotate independently thereon and forming one of a pair of engagingmembers, a ring about said wheel forming the other of said members, theengaging face of one member being conoidal and longer than the engagingpart ofthe other member, an adjustable counterbalance for said eccentricwheel, means for shifting one of said members longitudinally of theother while maintaining the engagement between them, and means forshifting the counterbalance, substantially as and for the purpose setforth.

1 t. In a variable-speed gearing, the combination of a rotary shaft, ashell having an internal conoidal surface, about and concentric withsaid shaft, provided with longitudinallyextending teeth and forming oneof a pair of engaging members, an inclined guide on the said shaft atthe same pitch as the conoidal surface of the shell, a cam slidablymounted on said guide, an eccentric drive-wheel, forming the otherengaging member, journaled on said cam and provided with peripheralradially-yielding teeth engaging said longitudinally-extending teeth, asecond shaft, a driving connection between said drive-wheel and secondshaft, and means for moving one of said members longitudinally withrelation to the other and at the same time sliding the cam upon saidguide, substantially as and for the purpose set forth.

15. In a variable-speed gearing, the combination of a rotary shaft, ashell having an internal conoidal surface about and concentric with saidshaft, provided with longitudinallyextending teeth and forming one of apair of engaging members, inclined guides on the said shaft at the samepitch as the conoidal surface of the shell but at right angles to eachother, a cam slidably mounted on one of said guides, an eccentricdrive-wheel forming the other engaging member, journaled on said cam andprovided with peripheral radiallyyielding teeth engaging saidlongitudinallyextending teeth, an adjustable counterbalance I for thecam and eccentric slidably mounted on the other of said guides, a secondshaft, a l driving connection between said drive-wheel and second shaft,and means for moving one of said members longitudinally with relation 1to the other and at the same time sliding the said cam andcounterbalance upon said guides, substantially as and for the purposeset forth.

16. The combination with drivingand driven bodies, of variable-speedgearing interposed between them having engaging members one of whichmoves as a planetwheel rolling against the other, the members beingadjustable one with relation to the other to gradually change therelative diameters o theiren gaging surfaces, and a driving connectionbetween one of the said bodies and the said rolling member, comprising ad isl: on the one having a plurality of circular bearirig-openings, androllers on the other of smaller diameter than said openings and engagingthe same.

17. 'lhecombination with drivingamldrivcn bodies, of variable-speedgearing interposed between them having engaging members one of whichmoves as a planet wheel rolling against the other, the members beingadjustable one with relation to the other to gradually change therelative diameters of their ongaging surfaces, and a driving connectionbetween one of the said bodies and the said rollingmember,comprisingadisk on the said body having a plurality of circularbearing-openings, and rollers on the said rolling member of smallerdiameter than said openings and engaging the same.

18. In a power-transmittinggear, the combination of a gear member freeto rotate upon its own axis and also to gyrate, said gear member havinga toothed contact-surface, a nonrevoluble member provided with a toothedcontact-surface of substantially conical shape engagedby said contactsurface of said gear member, means for shifting the general position ofsaid non-revoluble member relatively to said gear member, and mechanismconnected with said gear member for transmitting power to or from thesame.

19. In a power-transmitting gear, the combination of a driving memberand a driven member connected in operative engagement with each other bymeans of toothed, meshing,changeable-diameter contact-surfaces,one ofsaid members having agyratory movement and also a rotary movement, theother of said members being acted upon in response to said gyratorymovement, and means for shifting one of said members bodily in relationto the other.

20. In a power-transmitting gear, the combination of a gear member freeto rotate upon its own axis and also to ggvrate, said gear member havinga toothed contact-surface, a nonrevoluble member provided with a toothedcontact-surface of substantially conical shape engaged by saidcontact-surface of said gear member, means for bodily shiftingone ofsaid members with relation to the other while maintaining them in mesh,and mechanism connected with said gear member for transmitting power toor from the same.

21. In a power-transmitting gear, the combination of a toothed gearmember, means for actuating said gear member so as to cause the same togyrate, toothed mechanism meshing with said gear member in its gyrationsfor the purpose of causing said gear member to rotate upon its own axisat a speed independent of said gyrations, rotary mechanism connectedwith said gear member and having a positive motion in accordance withthe rota-' tion thereof, and mechanism controllable at will for shiftingthe position of said gear member relatively to said mechanism engagedthereby, for the purpose of varying the relative speed therebetween.

22. In a power-transmitting gear, the combination of a gear member freeto rotate upon its own axis and also to gyrate, said gear member havinga toothed contact-surface, a second member having a toothedcontact-surface meshing with that of said gear member and adapted toeoact therewith for changing the speed thereof according to thepositions of said gear member and said secon member relatively to eachother, means for transmitting power to or from said gear member, andmechanism for controlling the positions of said gear member and saidsecond member relatively to each other.

23. In a power-transmitting gear, the combination of a gear member freeto rotate upon its own axis and also to gyrate,said gear member having atoothed contact-surface, a second member having a toothed contactsurface meshing with said contact-surface of said gear member andadapted to coact therewith for changing the speed thereof according tothe positions of said gear member and said second member relativelytoeach other, means for transmitting power to or from said gear memher,and mechanism controllable at will for shifting said gear member bodilyin relation to said second member.

24. In a power-transmitting gear, the combination of a gear member freeto rotate upon its own axis and also to gy rate, said gear member havinga toothed contact-surface, a second member having a toothedcontact-surface meshing with said con tact-surface of said gear memberand adapted to coact therewith for changing the speed thereof accordingto the positions of said gear member and said second member relativelyto each other, means for transmitting power to or from said gear member,and shifting mechanism connected with both said gear member and withsaid second member and controllable at will for shifting the samerelatively to each other.

25. In a power-transmitting gear, the combination of a gear member freeto rotate upon its own axis and also to gyrate,said gear member having atoothed contact-surface, a second member having a toothedcontact-surface meshing with said contact-surface of said gear member,thereby causing said gear member to rotate as aforesaid upon its ownaxis, a shaft connected with said gear member for transmitting power toor from the same, and another shaft connected with said last-mentionedshaft and having a rotary movement corresponding to the gyratorymovement of said gear member.

WILLIAM C. CONANT. In presence of- HARRY W. ANDERSON, HARRY LESLIEWALHER.

